Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first image in a sequence according to afirst embodiment of our design for a display screen or portion thereofwith transitional graphical user interface;

FIG. 2 is a front view of a second image in the sequence thereof;

FIG. 3 is a front view of a first image in a sequence according to asecond embodiment of our design for a display screen or portion thereofwith transitional graphical user interface;

FIG. 4 is a front view of a second image in the sequence thereof;

FIG. 5 is a front view of a first image in a sequence according to athird embodiment of our design for a display screen or portion thereofwith transitional graphical user interface;

FIG. 6 is a front view of a second image in the sequence thereof;

FIG. 7 is a front view of a first image in a sequence according to afourth embodiment of our design for a display screen or portion thereofwith transitional graphical user interface; and,

FIG. 8 is a front view of a second image in the sequence thereof.

The appearance of the transitional image transitions between the imagesshown in FIGS. 1-2 , between the images shown in FIGS. 3-4 , between theimages shown in FIGS. 5-6 , and between the images shown in FIGS. 7-8 ,respectively. The process or period in which one images transitions toanother forms no part of the claimed design.

The shading in FIGS. 5-8 is a part of the claimed design.

The outermost broken line rounded rectangle showing an electronic deviceillustrates environmental subject matter. The broken line showing of adisplay screen, and all other broken lines showing portions of thegraphical user interface illustrate portions of the article. None of theaforementioned broken line subject matter forms part of the claimeddesign.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.